If you're trying to lose weight, food journaling helps you keep track of the calories you're consuming, and if you want to healthy you can track your fruit and veggie intake too. By meeting this challenge, you will be automatically entered for a chance to win our weekly prize — a $100 Nike gift card.

At the end of three months, we will pick a grand prize winner at random from all of the entries in all of the weekly challenges. Remember, the more you participate, the more chances you have to win the grand prize: a Get Fit Boot Camp in Los Angeles that includes a round-trip flight to Los Angeles, a four-night stay at the W Hollywood, a personal training session with celebrity trainer Jeanette Jenkins, a nutrition consultation with C & J Nutrition, and four workout sessions with our very own FitSugar editors that will be featured on PopSugar Living TV.